1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2021 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 #include "elf/common.h"
26 #include "elf/external.h"
27 #include "elf/internal.h"
30 #ifndef ENABLE_CHECKING
31 #define ENABLE_CHECKING 0
38 /* The number of entries in a section is its size divided by the size
39 of a single entry. This is normally only applicable to reloc and
40 symbol table sections.
41 PR 9934: It is possible to have relocations that do not refer to
42 symbols, thus it is also possible to have a relocation section in
43 an object file, but no symbol table. */
44 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
46 /* If size isn't specified as 64 or 32, NAME macro should fail. */
49 #define NAME(x, y) x ## 64 ## _ ## y
52 #define NAME(x, y) x ## 32 ## _ ## y
57 #define NAME(x, y) x ## NOSIZE ## _ ## y
60 #define ElfNAME(X) NAME(Elf,X)
61 #define elfNAME(X) NAME(elf,X)
63 /* Information held for an ELF symbol. The first field is the
64 corresponding asymbol. Every symbol is an ELF file is actually a
65 pointer to this structure, although it is often handled as a
66 pointer to an asymbol. */
72 /* ELF symbol information. */
73 Elf_Internal_Sym internal_elf_sym
;
74 /* Backend specific information. */
77 unsigned int hppa_arg_reloc
;
83 /* Version information. This is from an Elf_Internal_Versym
84 structure in a SHT_GNU_versym section. It is zero if there is no
85 version information. */
86 unsigned short version
;
90 struct elf_strtab_hash
;
96 bfd_signed_vma refcount
;
98 struct got_entry
*glist
;
99 struct plt_entry
*plist
;
102 struct elf_link_virtual_table_entry
104 /* Virtual table entry use information. This array is nominally of size
105 size/sizeof(target_void_pointer), though we have to be able to assume
106 and track a size while the symbol is still undefined. It is indexed
107 via offset/sizeof(target_void_pointer). */
111 /* Virtual table derivation info. */
112 struct elf_link_hash_entry
*parent
;
115 /* ELF symbol version. */
116 enum elf_symbol_version
124 /* ELF linker hash table entries. */
126 struct elf_link_hash_entry
128 struct bfd_link_hash_entry root
;
130 /* Symbol index in output file. This is initialized to -1. It is
131 set to -2 if the symbol is used by a reloc. It is set to -3 if
132 this symbol is defined in a discarded section. */
135 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
136 -1 if this is not a dynamic symbol. */
137 /* ??? Note that this is consistently used as a synonym for tests
138 against whether we can perform various simplifying transformations
139 to the code. (E.g. changing a pc-relative jump to a PLT entry
140 into a pc-relative jump to the target function.) That test, which
141 is often relatively complex, and someplaces wrong or incomplete,
142 should really be replaced by a predicate in elflink.c.
144 End result: this field -1 does not indicate that the symbol is
145 not in the dynamic symbol table, but rather that the symbol is
146 not visible outside this DSO. */
149 /* If this symbol requires an entry in the global offset table, the
150 processor specific backend uses this field to track usage and
151 final offset. Two schemes are supported: The first assumes that
152 a symbol may only have one GOT entry, and uses REFCOUNT until
153 size_dynamic_sections, at which point the contents of the .got is
154 fixed. Afterward, if OFFSET is -1, then the symbol does not
155 require a global offset table entry. The second scheme allows
156 multiple GOT entries per symbol, managed via a linked list
157 pointed to by GLIST. */
158 union gotplt_union got
;
160 /* Same, but tracks a procedure linkage table entry. */
161 union gotplt_union plt
;
163 /* Symbol size. NB: All fields starting from here are cleared by
164 _bfd_elf_link_hash_newfunc. */
167 /* Track dynamic relocs copied for this symbol. */
168 struct elf_dyn_relocs
*dyn_relocs
;
170 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
171 unsigned int type
: 8;
173 /* Symbol st_other value, symbol visibility. */
174 unsigned int other
: 8;
176 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
177 unsigned int target_internal
: 8;
179 /* Symbol is referenced by a non-shared object (other than the object
180 in which it is defined). */
181 unsigned int ref_regular
: 1;
182 /* Symbol is defined by a non-shared object. */
183 unsigned int def_regular
: 1;
184 /* Symbol is referenced by a shared object. */
185 unsigned int ref_dynamic
: 1;
186 /* Symbol is defined by a shared object. */
187 unsigned int def_dynamic
: 1;
188 /* Symbol has a non-weak reference from a non-shared object (other than
189 the object in which it is defined). */
190 unsigned int ref_regular_nonweak
: 1;
191 /* Symbol has a non-weak reference from a LTO IR object file. */
192 unsigned int ref_ir_nonweak
: 1;
193 /* Dynamic symbol has been adjustd. */
194 unsigned int dynamic_adjusted
: 1;
195 /* Symbol needs a copy reloc. */
196 unsigned int needs_copy
: 1;
197 /* Symbol needs a procedure linkage table entry. */
198 unsigned int needs_plt
: 1;
199 /* Symbol appears in a non-ELF input file. */
200 unsigned int non_elf
: 1;
201 /* Symbol version information. */
202 ENUM_BITFIELD (elf_symbol_version
) versioned
: 2;
203 /* Symbol was forced to local scope due to a version script file. */
204 unsigned int forced_local
: 1;
205 /* Symbol was forced to be dynamic due to a version script file. */
206 unsigned int dynamic
: 1;
207 /* Symbol was marked during garbage collection. */
208 unsigned int mark
: 1;
209 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
210 not currently set by all the backends. */
211 unsigned int non_got_ref
: 1;
212 /* Symbol has a definition in a shared object.
213 FIXME: There is no real need for this field if def_dynamic is never
214 cleared and all places that test def_dynamic also test def_regular. */
215 unsigned int dynamic_def
: 1;
216 /* Symbol has a non-weak reference from a shared object. */
217 unsigned int ref_dynamic_nonweak
: 1;
218 /* Symbol is referenced with a relocation where C/C++ pointer equality
220 unsigned int pointer_equality_needed
: 1;
221 /* Symbol is a unique global symbol. */
222 unsigned int unique_global
: 1;
223 /* Symbol is defined by a shared library with non-default visibility
224 in a read/write section. */
225 unsigned int protected_def
: 1;
226 /* Symbol is __start_SECNAME or __stop_SECNAME to mark section
228 unsigned int start_stop
: 1;
229 /* Symbol is or was a weak defined symbol from a dynamic object with
230 a strong defined symbol alias. U.ALIAS points to a list of aliases,
231 the definition having is_weakalias clear. */
232 unsigned int is_weakalias
: 1;
234 /* String table index in .dynstr if this is a dynamic symbol. */
235 unsigned long dynstr_index
;
239 /* Points to a circular list of non-function symbol aliases. */
240 struct elf_link_hash_entry
*alias
;
242 /* Hash value of the name computed using the ELF hash function.
243 Used part way through size_dynamic_sections, after we've finished
245 unsigned long elf_hash_value
;
248 /* Version information. */
251 /* This field is used for a symbol which is not defined in a
252 regular object. It points to the version information read in
253 from the dynamic object. */
254 Elf_Internal_Verdef
*verdef
;
255 /* This field is used for a symbol which is defined in a regular
256 object. It is set up in size_dynamic_sections. It points to
257 the version information we should write out for this symbol. */
258 struct bfd_elf_version_tree
*vertree
;
263 /* For __start_SECNAME and __stop_SECNAME symbols, record the first
264 input section whose section name is SECNAME. */
265 asection
*start_stop_section
;
267 /* Vtable information. */
268 struct elf_link_virtual_table_entry
*vtable
;
272 /* Return the strong definition for a weak symbol with aliases. */
274 static inline struct elf_link_hash_entry
*
275 weakdef (struct elf_link_hash_entry
*h
)
277 while (h
->is_weakalias
)
282 /* Will references to this symbol always reference the symbol
284 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
285 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
287 /* Will _calls_ to this symbol always call the version in this object? */
288 #define SYMBOL_CALLS_LOCAL(INFO, H) \
289 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
291 /* Whether an undefined weak symbol should resolve to its link-time
292 value, even in PIC or PIE objects. */
293 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
294 ((H)->root.type == bfd_link_hash_undefweak \
295 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
296 || (INFO)->dynamic_undefined_weak == 0))
298 /* Common symbols that are turned into definitions don't have the
299 DEF_REGULAR flag set, so they might appear to be undefined.
300 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
301 #define ELF_COMMON_DEF_P(H) \
303 && !(H)->def_dynamic \
304 && (H)->root.type == bfd_link_hash_defined)
306 /* Records local symbols to be emitted in the dynamic symbol table. */
308 struct elf_link_local_dynamic_entry
310 struct elf_link_local_dynamic_entry
*next
;
312 /* The input bfd this symbol came from. */
315 /* The index of the local symbol being copied. */
318 /* The index in the outgoing dynamic symbol table. */
321 /* A copy of the input symbol. */
322 Elf_Internal_Sym isym
;
325 struct elf_link_loaded_list
327 struct elf_link_loaded_list
*next
;
331 /* Structures used by the eh_frame optimization code. */
336 /* If REMOVED == 1, this is the CIE that the FDE originally used.
337 The CIE belongs to the same .eh_frame input section as the FDE.
339 If REMOVED == 0, this is the CIE that we have chosen to use for
340 the output FDE. The CIE's REMOVED field is also 0, but the CIE
341 might belong to a different .eh_frame input section from the FDE.
343 May be NULL to signify that the FDE should be discarded. */
344 struct eh_cie_fde
*cie_inf
;
345 struct eh_cie_fde
*next_for_section
;
348 /* CIEs have three states:
350 - REMOVED && !MERGED: Slated for removal because we haven't yet
351 proven that an FDE needs it. FULL_CIE, if nonnull, points to
352 more detailed information about the CIE.
354 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
355 which may not belong to the same input section.
357 - !REMOVED: We have decided to keep this CIE. SEC is the
358 .eh_frame input section that contains the CIE. */
360 struct cie
*full_cie
;
361 struct eh_cie_fde
*merged_with
;
365 /* The offset of the personality data from the start of the CIE,
366 or 0 if the CIE doesn't have any. */
367 unsigned int personality_offset
: 8;
369 /* Length of augmentation. aug_str_len is the length of the
370 string including null terminator. aug_data_len is the length
371 of the rest up to the initial insns. */
372 unsigned int aug_str_len
: 3;
373 unsigned int aug_data_len
: 5;
375 /* True if we have marked relocations associated with this CIE. */
376 unsigned int gc_mark
: 1;
378 /* True if we have decided to turn an absolute LSDA encoding into
379 a PC-relative one. */
380 unsigned int make_lsda_relative
: 1;
382 /* True if we have decided to turn an absolute personality
383 encoding into a PC-relative one. */
384 unsigned int make_per_encoding_relative
: 1;
386 /* True if the CIE contains personality data and if that
387 data uses a PC-relative encoding. Always true when
388 make_per_encoding_relative is. */
389 unsigned int per_encoding_relative
: 1;
391 /* True if the CIE contains personality data aligned to a
392 multiple of eight bytes. */
393 unsigned int per_encoding_aligned8
: 1;
395 /* True if we need to add an 'R' (FDE encoding) entry to the
396 CIE's augmentation data. */
397 unsigned int add_fde_encoding
: 1;
399 /* True if we have merged this CIE with another. */
400 unsigned int merged
: 1;
403 unsigned int pad1
: 9;
406 unsigned int reloc_index
;
409 unsigned int new_offset
;
410 unsigned int fde_encoding
: 8;
411 unsigned int lsda_encoding
: 8;
412 unsigned int lsda_offset
: 8;
414 /* True if this entry represents a CIE, false if it represents an FDE. */
415 unsigned int cie
: 1;
417 /* True if this entry is currently marked for removal. */
418 unsigned int removed
: 1;
420 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
421 augmentation data, and an associated byte to each of the CIE's FDEs. */
422 unsigned int add_augmentation_size
: 1;
424 /* True if we have decided to convert absolute FDE relocations into
425 relative ones. This applies to the first relocation in the FDE,
426 which is against the code that the FDE describes. */
427 unsigned int make_relative
: 1;
430 unsigned int pad1
: 4;
432 unsigned int *set_loc
;
435 struct eh_frame_sec_info
439 struct eh_cie_fde entry
[1];
442 struct eh_frame_array_ent
451 #define DWARF2_EH_HDR 1
452 #define COMPACT_EH_HDR 2
454 /* Endian-neutral code indicating that a function cannot be unwound. */
455 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
457 struct dwarf_eh_frame_hdr_info
460 unsigned int fde_count
;
461 /* TRUE if .eh_frame_hdr should contain the sorted search table.
462 We build it if we successfully read all .eh_frame input sections
463 and recognize them. */
465 struct eh_frame_array_ent
*array
;
468 struct compact_eh_frame_hdr_info
470 unsigned int allocated_entries
;
471 /* eh_frame_entry fragments. */
475 struct eh_frame_hdr_info
478 unsigned int array_count
;
479 bool frame_hdr_is_compact
;
482 struct dwarf_eh_frame_hdr_info dwarf
;
483 struct compact_eh_frame_hdr_info compact
;
488 /* Enum used to identify target specific extensions to the elf_obj_tdata
489 and elf_link_hash_table structures. Note the enums deliberately start
490 from 1 so that we can detect an uninitialized field. The generic value
491 is last so that additions to this enum do not need to modify more than
495 AARCH64_ELF_DATA
= 1,
535 struct elf_sym_strtab
537 Elf_Internal_Sym sym
;
538 unsigned long dest_index
;
539 unsigned long destshndx_index
;
542 struct bfd_link_needed_list
544 struct bfd_link_needed_list
*next
;
552 is_solaris
, /* Solaris. */
553 is_vxworks
, /* VxWorks. */
554 is_nacl
/* Native Client. */
557 /* Used by bfd_sym_from_r_symndx to cache a small number of local
559 #define LOCAL_SYM_CACHE_SIZE 32
563 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
564 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
567 /* ELF linker hash table. */
569 struct elf_link_hash_table
571 struct bfd_link_hash_table root
;
573 /* An identifier used to distinguish different target
574 specific extensions to this structure. */
575 enum elf_target_id hash_table_id
;
577 /* Whether we have created the special dynamic sections required
578 when linking against or generating a shared object. */
579 bool dynamic_sections_created
;
581 /* Whether dynamic relocations are present. */
584 /* True if this target has relocatable executables, so needs dynamic
586 bool is_relocatable_executable
;
588 /* TRUE if there are IFUNC resolvers. */
589 bool ifunc_resolvers
;
591 /* TRUE if DT_PLTGOT is a required dynamic tag. */
592 bool dt_pltgot_required
;
594 /* TRUE if DT_JMPREL is a required dynamic tag. */
595 bool dt_jmprel_required
;
597 /* The BFD used to hold special sections created by the linker.
598 This will be the first BFD found which requires these sections to
602 /* The value to use when initialising got.refcount/offset and
603 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
604 the values are refcounts. Set to init_got_offset/init_plt_offset
605 in size_dynamic_sections when the values may be offsets. */
606 union gotplt_union init_got_refcount
;
607 union gotplt_union init_plt_refcount
;
609 /* The value to use for got.refcount/offset and plt.refcount/offset
610 when the values may be offsets. Normally (bfd_vma) -1. */
611 union gotplt_union init_got_offset
;
612 union gotplt_union init_plt_offset
;
614 /* The number of symbols found in the link which is intended for the
615 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
616 bfd_size_type dynsymcount
;
617 bfd_size_type local_dynsymcount
;
619 /* The string table of dynamic symbols, which becomes the .dynstr
621 struct elf_strtab_hash
*dynstr
;
623 /* The number of symbol strings found in the link which must be put
624 into the .strtab section. */
625 bfd_size_type strtabcount
;
627 /* The array size of the symbol string table, which becomes the
629 bfd_size_type strtabsize
;
631 /* The array of strings, which becomes the .strtab section. */
632 struct elf_sym_strtab
*strtab
;
634 /* The number of buckets in the hash table in the .hash section.
635 This is based on the number of dynamic symbols. */
636 bfd_size_type bucketcount
;
638 /* A linked list of DT_NEEDED names found in dynamic objects
639 included in the link. */
640 struct bfd_link_needed_list
*needed
;
642 /* Sections in the output bfd that provides a section symbol
643 to be used by relocations emitted against local symbols.
644 Most targets will not use data_index_section. */
645 asection
*text_index_section
;
646 asection
*data_index_section
;
648 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
649 struct elf_link_hash_entry
*hgot
;
651 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
652 struct elf_link_hash_entry
*hplt
;
654 /* The _DYNAMIC symbol. */
655 struct elf_link_hash_entry
*hdynamic
;
657 /* A pointer to information used to merge SEC_MERGE sections. */
660 /* Used to link stabs in sections. */
661 struct stab_info stab_info
;
663 /* Used by eh_frame code when editing .eh_frame. */
664 struct eh_frame_hdr_info eh_info
;
666 /* A linked list of local symbols to be added to .dynsym. */
667 struct elf_link_local_dynamic_entry
*dynlocal
;
669 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
670 objects included in the link. */
671 struct bfd_link_needed_list
*runpath
;
673 /* Cached first output tls section and size of PT_TLS segment. */
675 bfd_size_type tls_size
; /* Bytes. */
677 /* The offset into splt of the PLT entry for the TLS descriptor
678 resolver. Special values are 0, if not necessary (or not found
679 to be necessary yet), and -1 if needed but not determined
683 /* The GOT offset for the lazy trampoline. Communicated to the
684 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
685 indicates an offset is not allocated. */
688 /* Target OS for linker output. */
689 enum elf_target_os target_os
;
691 /* A linked list of dynamic BFD's loaded in the link. */
692 struct elf_link_loaded_list
*dyn_loaded
;
694 /* Small local sym cache. */
695 struct sym_cache sym_cache
;
697 /* Short-cuts to get to dynamic linker sections. */
706 asection
*sreldynrelro
;
714 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
717 is_elf_hash_table (const struct bfd_link_hash_table
*htab
)
719 return htab
->type
== bfd_link_elf_hash_table
;
722 /* Look up an entry in an ELF linker hash table. */
724 static inline struct elf_link_hash_entry
*
725 elf_link_hash_lookup (struct elf_link_hash_table
*table
, const char *string
,
726 bool create
, bool copy
, bool follow
)
728 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
730 return (struct elf_link_hash_entry
*)
731 bfd_link_hash_lookup (&table
->root
, string
, create
, copy
, follow
);
734 /* Traverse an ELF linker hash table. */
737 elf_link_hash_traverse (struct elf_link_hash_table
*table
,
738 bool (*f
) (struct elf_link_hash_entry
*, void *),
741 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
743 bfd_link_hash_traverse (&table
->root
,
744 (bool (*) (struct bfd_link_hash_entry
*, void *)) f
,
748 /* Get the ELF linker hash table from a link_info structure. */
750 static inline struct elf_link_hash_table
*
751 elf_hash_table (const struct bfd_link_info
*info
)
753 return (struct elf_link_hash_table
*) info
->hash
;
756 static inline enum elf_target_id
757 elf_hash_table_id (const struct elf_link_hash_table
*table
)
759 return table
->hash_table_id
;
762 /* Constant information held for an ELF backend. */
764 struct elf_size_info
{
765 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
766 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
768 /* The size of entries in the .hash section. */
769 unsigned char sizeof_hash_entry
;
771 /* The number of internal relocations to allocate per external
773 unsigned char int_rels_per_ext_rel
;
774 /* We use some fixed size arrays. This should be large enough to
775 handle all back-ends. */
776 #define MAX_INT_RELS_PER_EXT_REL 3
778 unsigned char arch_size
, log_file_align
;
779 unsigned char elfclass
, ev_current
;
780 int (*write_out_phdrs
)
781 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
782 bool (*write_shdrs_and_ehdr
) (bfd
*);
783 bool (*checksum_contents
)
784 (bfd
* , void (*) (const void *, size_t, void *), void *);
786 (bfd
*, asection
*, void *);
787 bool (*swap_symbol_in
)
788 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
789 void (*swap_symbol_out
)
790 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
791 bool (*slurp_reloc_table
)
792 (bfd
*, asection
*, asymbol
**, bool);
793 long (*slurp_symbol_table
)
794 (bfd
*, asymbol
**, bool);
796 (bfd
*, const void *, Elf_Internal_Dyn
*);
798 (bfd
*, const Elf_Internal_Dyn
*, void *);
800 /* This function is called to swap in a REL relocation. If an
801 external relocation corresponds to more than one internal
802 relocation, then all relocations are swapped in at once. */
803 void (*swap_reloc_in
)
804 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
806 /* This function is called to swap out a REL relocation. */
807 void (*swap_reloc_out
)
808 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
810 /* This function is called to swap in a RELA relocation. If an
811 external relocation corresponds to more than one internal
812 relocation, then all relocations are swapped in at once. */
813 void (*swap_reloca_in
)
814 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
816 /* This function is called to swap out a RELA relocation. */
817 void (*swap_reloca_out
)
818 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
821 #define elf_symbol_from(S) \
822 ((((S)->flags & BSF_SYNTHETIC) == 0 \
823 && (S)->the_bfd != NULL \
824 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
825 && (S)->the_bfd->tdata.elf_obj_data != 0) \
826 ? (elf_symbol_type *) (S) \
829 enum elf_reloc_type_class
{
831 reloc_class_relative
,
837 struct elf_reloc_cookie
839 Elf_Internal_Rela
*rels
, *rel
, *relend
;
840 Elf_Internal_Sym
*locsyms
;
844 struct elf_link_hash_entry
**sym_hashes
;
849 /* The level of IRIX compatibility we're striving for. */
857 /* Mapping of ELF section names and types. */
858 struct bfd_elf_special_section
861 unsigned int prefix_length
;
862 /* 0 means name must match PREFIX exactly.
863 -1 means name must start with PREFIX followed by an arbitrary string.
864 -2 means name must match PREFIX exactly or consist of PREFIX followed
865 by a dot then anything.
866 > 0 means name must start with the first PREFIX_LENGTH chars of
867 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
868 signed int suffix_length
;
873 enum action_discarded
879 typedef asection
* (*elf_gc_mark_hook_fn
)
880 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
881 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
883 enum elf_property_kind
885 /* A new property. */
886 property_unknown
= 0,
887 /* A property ignored by backend. */
889 /* A corrupt property reported by backend. */
891 /* A property should be removed due to property merge. */
893 /* A property which is a number. */
897 typedef struct elf_property
899 unsigned int pr_type
;
900 unsigned int pr_datasz
;
903 /* For property_number, this is a number. */
905 /* Add a new one if elf_property_kind is updated. */
907 enum elf_property_kind pr_kind
;
910 typedef struct elf_property_list
912 struct elf_property_list
*next
;
913 struct elf_property property
;
916 struct bfd_elf_section_reloc_data
;
918 struct elf_backend_data
920 /* The architecture for this backend. */
921 enum bfd_architecture arch
;
923 /* An identifier used to distinguish different target specific
924 extensions to elf_obj_tdata and elf_link_hash_table structures. */
925 enum elf_target_id target_id
;
928 enum elf_target_os target_os
;
930 /* The ELF machine code (EM_xxxx) for this backend. */
931 int elf_machine_code
;
936 /* The maximum page size for this backend. */
939 /* The minimum page size for this backend. An input object will not be
940 considered page aligned unless its sections are correctly aligned for
941 pages at least this large. May be smaller than maxpagesize. */
944 /* The common page size for this backend. */
945 bfd_vma commonpagesize
;
947 /* The value of commonpagesize to use when -z relro for this backend. */
948 bfd_vma relropagesize
;
950 /* The BFD flags applied to sections created for dynamic linking. */
951 flagword dynamic_sec_flags
;
953 /* Architecture-specific data for this backend.
954 This is actually a pointer to some type like struct elf_ARCH_data. */
955 const void *arch_data
;
957 /* A function to translate an ELF RELA relocation to a BFD arelent
958 structure. Returns TRUE upon success, FALSE otherwise. */
959 bool (*elf_info_to_howto
)
960 (bfd
*, arelent
*, Elf_Internal_Rela
*);
962 /* A function to translate an ELF REL relocation to a BFD arelent
963 structure. Returns TRUE upon success, FALSE otherwise. */
964 bool (*elf_info_to_howto_rel
)
965 (bfd
*, arelent
*, Elf_Internal_Rela
*);
967 /* A function to determine whether a symbol is global when
968 partitioning the symbol table into local and global symbols.
969 This should be NULL for most targets, in which case the correct
970 thing will be done. MIPS ELF, at least on the Irix 5, has
971 special requirements. */
972 bool (*elf_backend_sym_is_global
)
975 /* The remaining functions are hooks which are called only if they
978 /* A function to permit a backend specific check on whether a
979 particular BFD format is relevant for an object file, and to
980 permit the backend to set any global information it wishes. When
981 this is called elf_elfheader is set, but anything else should be
982 used with caution. If this returns FALSE, the check_format
983 routine will return a bfd_error_wrong_format error. */
984 bool (*elf_backend_object_p
)
987 /* A function to do additional symbol processing when reading the
988 ELF symbol table. This is where any processor-specific special
989 section indices are handled. */
990 void (*elf_backend_symbol_processing
)
993 /* A function to do additional symbol processing after reading the
994 entire ELF symbol table. */
995 bool (*elf_backend_symbol_table_processing
)
996 (bfd
*, elf_symbol_type
*, unsigned int);
998 /* A function to set the type of the info field. Processor-specific
999 types should be handled here. */
1000 int (*elf_backend_get_symbol_type
)
1001 (Elf_Internal_Sym
*, int);
1003 /* A function to return the linker hash table entry of a symbol that
1004 might be satisfied by an archive symbol. */
1005 struct bfd_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
1006 (bfd
*, struct bfd_link_info
*, const char *);
1008 /* Return true if local section symbols should have a non-null st_name.
1009 NULL implies false. */
1010 bool (*elf_backend_name_local_section_symbols
)
1013 /* A function to do additional processing on the ELF section header
1014 just before writing it out. This is used to set the flags and
1015 type fields for some sections, or to actually write out data for
1016 unusual sections. */
1017 bool (*elf_backend_section_processing
)
1018 (bfd
*, Elf_Internal_Shdr
*);
1020 /* A function to handle unusual section types when creating BFD
1021 sections from ELF sections. */
1022 bool (*elf_backend_section_from_shdr
)
1023 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1025 /* A function to convert machine dependent ELF section header flags to
1026 BFD internal section header flags. */
1027 bool (*elf_backend_section_flags
)
1028 (const Elf_Internal_Shdr
*);
1030 /* A function that returns a struct containing ELF section flags and
1031 type for the given BFD section. */
1032 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
1033 (bfd
*, asection
*);
1035 /* A function to handle unusual program segment types when creating BFD
1036 sections from ELF program segments. */
1037 bool (*elf_backend_section_from_phdr
)
1038 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1040 /* A function to set up the ELF section header for a BFD section in
1041 preparation for writing it out. This is where the flags and type
1042 fields are set for unusual sections. */
1043 bool (*elf_backend_fake_sections
)
1044 (bfd
*, Elf_Internal_Shdr
*, asection
*);
1046 /* A function to get the ELF section index for a BFD section. If
1047 this returns TRUE, the section was found. If it is a normal ELF
1048 section, *RETVAL should be left unchanged. If it is not a normal
1049 ELF section *RETVAL should be set to the SHN_xxxx index. */
1050 bool (*elf_backend_section_from_bfd_section
)
1051 (bfd
*, asection
*, int *retval
);
1053 /* If this field is not NULL, it is called by the add_symbols phase
1054 of a link just before adding a symbol to the global linker hash
1055 table. It may modify any of the fields as it wishes. If *NAME
1056 is set to NULL, the symbol will be skipped rather than being
1057 added to the hash table. This function is responsible for
1058 handling all processor dependent symbol bindings and section
1059 indices, and must set at least *FLAGS and *SEC for each processor
1060 dependent case; failure to do so will cause a link error. */
1061 bool (*elf_add_symbol_hook
)
1062 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
1063 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
1065 /* If this field is not NULL, it is called by the elf_link_output_sym
1066 phase of a link for each symbol which will appear in the object file.
1067 On error, this function returns 0. 1 is returned when the symbol
1068 should be output, 2 is returned when the symbol should be discarded. */
1069 int (*elf_backend_link_output_symbol_hook
)
1070 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
1071 asection
*, struct elf_link_hash_entry
*);
1073 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
1074 linker the first time it encounters a dynamic object in the link.
1075 This function must create any sections required for dynamic
1076 linking. The ABFD argument is a dynamic object. The .interp,
1077 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1078 created, and this function may modify the section flags if
1079 desired. This function will normally create the .got and .plt
1080 sections, but different backends have different requirements. */
1081 bool (*elf_backend_create_dynamic_sections
)
1082 (bfd
*abfd
, struct bfd_link_info
*info
);
1084 /* When creating a shared library, determine whether to omit the
1085 dynamic symbol for the section. */
1086 bool (*elf_backend_omit_section_dynsym
)
1087 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1089 /* Return TRUE if relocations of targets are compatible to the extent
1090 that CHECK_RELOCS will properly process them. PR 4424. */
1091 bool (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1093 /* The CHECK_RELOCS function is called by the add_symbols phase of
1094 the ELF backend linker. It is called once for each section with
1095 relocs of an object file, just after the symbols for the object
1096 file have been added to the global linker hash table. The
1097 function must look through the relocs and do any special handling
1098 required. This generally means allocating space in the global
1099 offset table, and perhaps allocating space for a reloc. The
1100 relocs are always passed as Rela structures; if the section
1101 actually uses Rel structures, the r_addend field will always be
1103 bool (*check_relocs
)
1104 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1105 const Elf_Internal_Rela
*relocs
);
1107 /* The CHECK_DIRECTIVES function is called once per input file by
1108 the add_symbols phase of the ELF backend linker. The function
1109 must inspect the bfd and create any additional symbols according
1110 to any custom directives in the bfd. */
1111 bool (*check_directives
)
1112 (bfd
*abfd
, struct bfd_link_info
*info
);
1114 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1115 handle an as-needed lib (ACT = notice_as_needed), and after the
1116 linker has decided to keep the lib (ACT = notice_needed) or when
1117 the lib is not needed (ACT = notice_not_needed). */
1118 bool (*notice_as_needed
)
1119 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1121 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1122 linker for every symbol which is defined by a dynamic object and
1123 referenced by a regular object. This is called after all the
1124 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1125 function has been called. The hash table entry should be
1126 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1127 defined in a section from a dynamic object. Dynamic object
1128 sections are not included in the final link, and this function is
1129 responsible for changing the value to something which the rest of
1130 the link can deal with. This will normally involve adding an
1131 entry to the .plt or .got or some such section, and setting the
1132 symbol to point to that. */
1133 bool (*elf_backend_adjust_dynamic_symbol
)
1134 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1136 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1137 after all the linker input files have been seen but before the
1138 section sizes have been set. This is called after
1139 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1140 bool (*elf_backend_always_size_sections
)
1141 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1143 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1144 linker after all the linker input files have been seen but before
1145 the sections sizes have been set. This is called after
1146 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1147 It is only called when linking against a dynamic object. It must
1148 set the sizes of the dynamic sections, and may fill in their
1149 contents as well. The generic ELF linker can handle the .dynsym,
1150 .dynstr and .hash sections. This function must handle the
1151 .interp section and any sections created by the
1152 CREATE_DYNAMIC_SECTIONS entry point. */
1153 bool (*elf_backend_size_dynamic_sections
)
1154 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1156 /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
1157 ELF backend linker to strip zero-sized dynamic sections after
1158 the section sizes have been set. */
1159 bool (*elf_backend_strip_zero_sized_dynamic_sections
)
1160 (struct bfd_link_info
*info
);
1162 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1163 we keep to use as a base for relocs and symbols. */
1164 void (*elf_backend_init_index_section
)
1165 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1167 /* The RELOCATE_SECTION function is called by the ELF backend linker
1168 to handle the relocations for a section.
1170 The relocs are always passed as Rela structures; if the section
1171 actually uses Rel structures, the r_addend field will always be
1174 This function is responsible for adjust the section contents as
1175 necessary, and (if using Rela relocs and generating a
1176 relocatable output file) adjusting the reloc addend as
1179 This function does not have to worry about setting the reloc
1180 address or the reloc symbol index.
1182 LOCAL_SYMS is a pointer to the swapped in local symbols.
1184 LOCAL_SECTIONS is an array giving the section in the input file
1185 corresponding to the st_shndx field of each local symbol.
1187 The global hash table entry for the global symbols can be found
1188 via elf_sym_hashes (input_bfd).
1190 When generating relocatable output, this function must handle
1191 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1192 going to be the section symbol corresponding to the output
1193 section, which means that the addend must be adjusted
1196 Returns FALSE on error, TRUE on success, 2 if successful and
1197 relocations should be written for this section. */
1198 int (*elf_backend_relocate_section
)
1199 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1200 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1201 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1203 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1204 linker just before it writes a symbol out to the .dynsym section.
1205 The processor backend may make any required adjustment to the
1206 symbol. It may also take the opportunity to set contents of the
1207 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1208 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1209 on those symbols which are defined by a dynamic object. */
1210 bool (*elf_backend_finish_dynamic_symbol
)
1211 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1212 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1214 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1215 linker just before it writes all the dynamic sections out to the
1216 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1217 all dynamic symbols. */
1218 bool (*elf_backend_finish_dynamic_sections
)
1219 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1221 /* A function to do any beginning processing needed for the ELF file
1222 before building the ELF headers and computing file positions. */
1223 void (*elf_backend_begin_write_processing
)
1224 (bfd
*, struct bfd_link_info
*);
1226 /* A function to do any final processing needed for the ELF file
1227 before writing it out. */
1228 bool (*elf_backend_final_write_processing
)
1231 /* This function is called by get_program_header_size. It should
1232 return the number of additional program segments which this BFD
1233 will need. It should return -1 on error. */
1234 int (*elf_backend_additional_program_headers
)
1235 (bfd
*, struct bfd_link_info
*);
1237 /* This function is called to modify an existing segment map in a
1238 backend specific fashion. */
1239 bool (*elf_backend_modify_segment_map
)
1240 (bfd
*, struct bfd_link_info
*);
1242 /* This function is called to modify program headers just before
1243 they are written. */
1244 bool (*elf_backend_modify_headers
)
1245 (bfd
*, struct bfd_link_info
*);
1247 /* This function is called to see if the PHDR header should be
1248 checked for validity. */
1249 bool (*elf_backend_allow_non_load_phdr
)
1250 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1252 /* This function is called before section garbage collection to
1253 mark entry symbol sections. */
1255 (struct bfd_link_info
*);
1257 /* This function is called during section garbage collection to
1258 mark sections that define global symbols. */
1259 bool (*gc_mark_dynamic_ref
)
1260 (struct elf_link_hash_entry
*, void *);
1262 /* This function is called during section gc to discover the section a
1263 particular relocation refers to. */
1264 elf_gc_mark_hook_fn gc_mark_hook
;
1266 /* This function, if defined, is called after the first gc marking pass
1267 to allow the backend to mark additional sections. */
1268 bool (*gc_mark_extra_sections
)
1269 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1271 /* This function is called to initialise ELF file header info.
1272 Customised versions can modify things like the OS and ABI version. */
1273 bool (*elf_backend_init_file_header
)
1274 (bfd
*, struct bfd_link_info
*);
1276 /* This function, if defined, prints a symbol to file and returns the
1277 name of the symbol to be printed. It should return NULL to fall
1278 back to default symbol printing. */
1279 const char *(*elf_backend_print_symbol_all
)
1280 (bfd
*, void *, asymbol
*);
1282 /* This function, if defined, is called after all local symbols and
1283 global symbols converted to locals are emitted into the symtab
1284 section. It allows the backend to emit special local symbols
1285 not handled in the hash table. */
1286 bool (*elf_backend_output_arch_local_syms
)
1287 (bfd
*, struct bfd_link_info
*, void *,
1288 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1289 struct elf_link_hash_entry
*));
1291 /* This function, if defined, is called after all symbols are emitted
1292 into the symtab section. It allows the backend to emit special
1293 global symbols not handled in the hash table. */
1294 bool (*elf_backend_output_arch_syms
)
1295 (bfd
*, struct bfd_link_info
*, void *,
1296 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1297 struct elf_link_hash_entry
*));
1299 /* Filter what symbols of the output file to include in the import
1300 library if one is created. */
1301 unsigned int (*elf_backend_filter_implib_symbols
)
1302 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1304 /* Copy any information related to dynamic linking from a pre-existing
1305 symbol to a newly created symbol. Also called to copy flags and
1306 other back-end info to a weakdef, in which case the symbol is not
1307 newly created and plt/got refcounts and dynamic indices should not
1309 void (*elf_backend_copy_indirect_symbol
)
1310 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1311 struct elf_link_hash_entry
*);
1313 /* Modify any information related to dynamic linking such that the
1314 symbol is not exported. */
1315 void (*elf_backend_hide_symbol
)
1316 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
1318 /* A function to do additional symbol fixup, called by
1319 _bfd_elf_fix_symbol_flags. */
1320 bool (*elf_backend_fixup_symbol
)
1321 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1323 /* Merge the backend specific symbol attribute. */
1324 void (*elf_backend_merge_symbol_attribute
)
1325 (struct elf_link_hash_entry
*, unsigned int, bool, bool);
1327 /* This function, if defined, will return a string containing the
1328 name of a target-specific dynamic tag. */
1329 char *(*elf_backend_get_target_dtag
)
1332 /* Decide whether an undefined symbol is special and can be ignored.
1333 This is the case for OPTIONAL symbols on IRIX. */
1334 bool (*elf_backend_ignore_undef_symbol
)
1335 (struct elf_link_hash_entry
*);
1337 /* Emit relocations. Overrides default routine for emitting relocs,
1338 except during a relocatable link, or if all relocs are being emitted. */
1339 bool (*elf_backend_emit_relocs
)
1340 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1341 struct elf_link_hash_entry
**);
1343 /* Update relocations. It is allowed to change the number and the order.
1344 In such a case hashes should be invalidated. */
1345 void (*elf_backend_update_relocs
)
1346 (asection
*, struct bfd_elf_section_reloc_data
*);
1348 /* Count relocations. Not called for relocatable links
1349 or if all relocs are being preserved in the output. */
1350 unsigned int (*elf_backend_count_relocs
)
1351 (struct bfd_link_info
*, asection
*);
1353 /* Count additionals relocations. Called for relocatable links if
1354 additional relocations needs to be created. */
1355 unsigned int (*elf_backend_count_additional_relocs
)
1358 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1359 by r_offset. If NULL, default to true. */
1360 bool (*sort_relocs_p
)
1363 /* This function, if defined, is called when an NT_PRSTATUS note is found
1365 bool (*elf_backend_grok_prstatus
)
1366 (bfd
*, Elf_Internal_Note
*);
1368 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1369 note is found in a core file. */
1370 bool (*elf_backend_grok_psinfo
)
1371 (bfd
*, Elf_Internal_Note
*);
1373 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1374 note is found in a core file. */
1375 bool (*elf_backend_grok_freebsd_prstatus
)
1376 (bfd
*, Elf_Internal_Note
*);
1378 /* This function, if defined, is called to write a note to a corefile. */
1379 char *(*elf_backend_write_core_note
)
1380 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1382 /* This function, if defined, is called to convert target-specific
1383 section flag names into hex values. */
1384 flagword (*elf_backend_lookup_section_flags_hook
)
1387 /* This function returns class of a reloc type. */
1388 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1389 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1391 /* This function, if defined, removes information about discarded functions
1392 from other sections which mention them. */
1393 bool (*elf_backend_discard_info
)
1394 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1396 /* This function, if defined, signals that the function above has removed
1397 the discarded relocations for this section. */
1398 bool (*elf_backend_ignore_discarded_relocs
)
1401 /* What to do when ld finds relocations against symbols defined in
1402 discarded sections. */
1403 unsigned int (*action_discarded
)
1406 /* This function returns the width of FDE pointers in bytes, or 0 if
1407 that can't be determined for some reason. The default definition
1408 goes by the bfd's EI_CLASS. */
1409 unsigned int (*elf_backend_eh_frame_address_size
)
1410 (bfd
*, const asection
*);
1412 /* These functions tell elf-eh-frame whether to attempt to turn
1413 absolute or lsda encodings into pc-relative ones. The default
1414 definition enables these transformations. */
1415 bool (*elf_backend_can_make_relative_eh_frame
)
1416 (bfd
*, struct bfd_link_info
*, asection
*);
1417 bool (*elf_backend_can_make_lsda_relative_eh_frame
)
1418 (bfd
*, struct bfd_link_info
*, asection
*);
1420 /* This function returns an encoding after computing the encoded
1421 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1422 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1423 The default definition chooses a 32-bit PC-relative encoding. */
1424 bfd_byte (*elf_backend_encode_eh_address
)
1425 (bfd
*abfd
, struct bfd_link_info
*info
,
1426 asection
*osec
, bfd_vma offset
,
1427 asection
*loc_sec
, bfd_vma loc_offset
,
1430 /* This function, if defined, may write out the given section.
1431 Returns TRUE if it did so and FALSE if the caller should. */
1432 bool (*elf_backend_write_section
)
1433 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1435 /* This function, if defined, returns TRUE if it is section symbols
1436 only that are considered local for the purpose of partitioning the
1437 symbol table into local and global symbols. This should be NULL
1438 for most targets, in which case the correct thing will be done.
1439 MIPS ELF, at least on the Irix 5, has special requirements. */
1440 bool (*elf_backend_elfsym_local_is_section
)
1443 /* The level of IRIX compatibility we're striving for.
1444 MIPS ELF specific function. */
1445 irix_compat_t (*elf_backend_mips_irix_compat
)
1448 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1449 (bfd
*, unsigned int, bool);
1451 /* The swapping table to use when dealing with ECOFF information.
1452 Used for the MIPS ELF .mdebug section. */
1453 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1455 /* This function implements `bfd_elf_bfd_from_remote_memory';
1456 see elf.c, elfcode.h. */
1457 bfd
*(*elf_backend_bfd_from_remote_memory
)
1458 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1459 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1460 bfd_size_type len
));
1462 bool (*elf_backend_core_find_build_id
) (bfd
*, bfd_vma
);
1464 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1466 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1468 /* Is symbol defined in common section? */
1469 bool (*common_definition
) (Elf_Internal_Sym
*);
1471 /* Return a common section index for section. */
1472 unsigned int (*common_section_index
) (asection
*);
1474 /* Return a common section for section. */
1475 asection
*(*common_section
) (asection
*);
1477 /* Return TRUE if we can merge 2 definitions. */
1478 bool (*merge_symbol
) (struct elf_link_hash_entry
*,
1479 const Elf_Internal_Sym
*, asection
**,
1481 bfd
*, const asection
*);
1483 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1484 bool (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1486 /* If non-NULL, called to register the location of XLAT_LOC within
1487 .MIPS.xhash at which real final dynindx for H will be written.
1488 If XLAT_LOC is zero, the symbol is not included in
1489 .MIPS.xhash and no dynindx will be written. */
1490 void (*record_xhash_symbol
)
1491 (struct elf_link_hash_entry
*h
, bfd_vma xlat_loc
);
1493 /* Return TRUE if type is a function symbol type. */
1494 bool (*is_function_type
) (unsigned int type
);
1496 /* If the ELF symbol SYM might be a function in SEC, return the
1497 function size and set *CODE_OFF to the function's entry point,
1498 otherwise return zero. */
1499 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1502 /* Given NAME, the name of a relocation section stripped of its
1503 .rel/.rela prefix, return the section in ABFD to which the
1504 relocations apply. */
1505 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1507 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1508 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1509 FALSE otherwise. Can be called multiple times for a given section,
1510 until it returns TRUE. Most of the times it is called ISECTION will be
1511 set to an input section that might be associated with the output section.
1512 The last time that it is called, ISECTION will be set to NULL. */
1513 bool (*elf_backend_copy_special_section_fields
)
1514 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1515 Elf_Internal_Shdr
*osection
);
1517 /* Used to handle bad SHF_LINK_ORDER input. */
1518 void (*link_order_error_handler
) (const char *, ...);
1520 /* Name of the PLT relocation section. */
1521 const char *relplt_name
;
1523 /* Alternate EM_xxxx machine codes for this backend. */
1524 int elf_machine_alt1
;
1525 int elf_machine_alt2
;
1527 const struct elf_size_info
*s
;
1529 /* An array of target specific special sections. */
1530 const struct bfd_elf_special_section
*special_sections
;
1532 /* The size in bytes of the header for the GOT. This includes the
1533 so-called reserved entries on some systems. */
1534 bfd_vma got_header_size
;
1536 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1537 otherwise by the local symbol with index SYMNDX in IBFD. */
1538 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1539 struct elf_link_hash_entry
*h
,
1540 bfd
*ibfd
, unsigned long symndx
);
1542 /* The vendor name to use for a processor-standard attributes section. */
1543 const char *obj_attrs_vendor
;
1545 /* The section name to use for a processor-standard attributes section. */
1546 const char *obj_attrs_section
;
1548 /* Return 1, 2 or 3 to indicate what type of arguments a
1549 processor-specific tag takes. */
1550 int (*obj_attrs_arg_type
) (int);
1552 /* The section type to use for an attributes section. */
1553 unsigned int obj_attrs_section_type
;
1555 /* This function determines the order in which any attributes are
1556 written. It must be defined for input in the range
1557 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1558 is used in order to make unity easy). The returned value is the
1559 actual tag number to place in the input position. */
1560 int (*obj_attrs_order
) (int);
1562 /* Handle merging unknown attributes; either warn and return TRUE,
1563 or give an error and return FALSE. */
1564 bool (*obj_attrs_handle_unknown
) (bfd
*, int);
1566 /* Parse GNU properties. Return the property kind. If the property
1567 is corrupt, issue an error message and return property_corrupt. */
1568 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1572 /* Merge GNU properties. Return TRUE if property is updated. */
1573 bool (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*, bfd
*,
1574 elf_property
*, elf_property
*);
1576 /* Set up GNU properties. */
1577 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1579 /* Fix up GNU properties. */
1580 void (*fixup_gnu_properties
) (struct bfd_link_info
*,
1581 elf_property_list
**);
1583 /* Encoding used for compact EH tables. */
1584 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1586 /* Opcode representing no unwind. */
1587 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1589 /* Called when emitting an ELF symbol whoes input version had an
1590 ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
1591 Returns the value to be installed in the ST_SHNDX field of the
1592 emitted symbol. If not defined, the value is left unchanged. */
1593 unsigned int (*symbol_section_index
) (bfd
*, elf_symbol_type
*);
1595 /* Called when a section has extra reloc sections. */
1596 bool (*init_secondary_reloc_section
) (bfd
*, Elf_Internal_Shdr
*,
1597 const char *, unsigned int);
1599 /* Called when after loading the normal relocs for a section. */
1600 bool (*slurp_secondary_relocs
) (bfd
*, asection
*, asymbol
**, bool);
1602 /* Called after writing the normal relocs for a section. */
1603 bool (*write_secondary_relocs
) (bfd
*, asection
*);
1605 /* This is non-zero if static TLS segments require a special alignment. */
1606 unsigned static_tls_alignment
;
1608 /* Alignment for the PT_GNU_STACK segment. */
1609 unsigned stack_align
;
1611 /* Flag bits to assign to a section of type SHT_STRTAB. */
1612 unsigned long elf_strtab_flags
;
1614 /* This is TRUE if the linker should act like collect and gather
1615 global constructors and destructors by name. This is TRUE for
1616 MIPS ELF because the Irix 5 tools can not handle the .init
1618 unsigned collect
: 1;
1620 /* This is TRUE if the linker should ignore changes to the type of a
1621 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1622 record undefined functions as STT_OBJECT although the definitions
1624 unsigned type_change_ok
: 1;
1626 /* Whether the backend may use REL relocations. (Some backends use
1627 both REL and RELA relocations, and this flag is set for those
1629 unsigned may_use_rel_p
: 1;
1631 /* Whether the backend may use RELA relocations. (Some backends use
1632 both REL and RELA relocations, and this flag is set for those
1634 unsigned may_use_rela_p
: 1;
1636 /* Whether the default relocation type is RELA. If a backend with
1637 this flag set wants REL relocations for a particular section,
1638 it must note that explicitly. Similarly, if this flag is clear,
1639 and the backend wants RELA relocations for a particular
1641 unsigned default_use_rela_p
: 1;
1643 /* True if PLT and copy relocations should be RELA by default. */
1644 unsigned rela_plts_and_copies_p
: 1;
1646 /* Set if RELA relocations for a relocatable link can be handled by
1647 generic code. Backends that set this flag need do nothing in the
1648 backend relocate_section routine for relocatable linking. */
1649 unsigned rela_normal
: 1;
1651 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1653 unsigned dtrel_excludes_plt
: 1;
1655 /* TRUE if addresses "naturally" sign extend. This is used when
1656 swapping in from Elf32 when BFD64. */
1657 unsigned sign_extend_vma
: 1;
1659 unsigned want_got_plt
: 1;
1660 unsigned plt_readonly
: 1;
1661 unsigned want_plt_sym
: 1;
1662 unsigned plt_not_loaded
: 1;
1663 unsigned plt_alignment
: 4;
1664 unsigned can_gc_sections
: 1;
1665 unsigned can_refcount
: 1;
1666 unsigned want_got_sym
: 1;
1667 unsigned want_dynbss
: 1;
1668 unsigned want_dynrelro
: 1;
1670 /* Targets which do not support physical addressing often require
1671 that the p_paddr field in the section header to be set to zero.
1672 This field indicates whether this behavior is required. */
1673 unsigned want_p_paddr_set_to_zero
: 1;
1675 /* Target has broken hardware and/or kernel that requires pages not
1676 to be mapped twice with different permissions. */
1677 unsigned no_page_alias
: 1;
1679 /* True if an object file lacking a .note.GNU-stack section
1680 should be assumed to be requesting exec stack. At least one
1681 other file in the link needs to have a .note.GNU-stack section
1682 for a PT_GNU_STACK segment to be created. */
1683 unsigned default_execstack
: 1;
1685 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1686 in length rather than sec->size in length, if sec->rawsize is
1687 non-zero and smaller than sec->size. */
1688 unsigned caches_rawsize
: 1;
1690 /* Address of protected data defined in the shared library may be
1691 external, i.e., due to copy relocation. */
1692 unsigned extern_protected_data
: 1;
1694 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1696 unsigned always_renumber_dynsyms
: 1;
1698 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1699 members use a 16-bit data type. */
1700 unsigned linux_prpsinfo32_ugid16
: 1;
1702 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1703 members use a 16-bit data type. */
1704 unsigned linux_prpsinfo64_ugid16
: 1;
1707 /* Information about reloc sections associated with a bfd_elf_section_data
1709 struct bfd_elf_section_reloc_data
1711 /* The ELF header for the reloc section associated with this
1713 Elf_Internal_Shdr
*hdr
;
1714 /* The number of relocations currently assigned to HDR. */
1716 /* The ELF section number of the reloc section. Only used for an
1719 /* Used by the backend linker to store the symbol hash table entries
1720 associated with relocs against global symbols. */
1721 struct elf_link_hash_entry
**hashes
;
1724 /* Information stored for each BFD section in an ELF file. This
1725 structure is allocated by elf_new_section_hook. */
1727 struct bfd_elf_section_data
1729 /* The ELF header for this section. */
1730 Elf_Internal_Shdr this_hdr
;
1732 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1733 struct flag_info
*section_flag_info
;
1735 /* Information about the REL and RELA reloc sections associated
1736 with this section, if any. */
1737 struct bfd_elf_section_reloc_data rel
, rela
;
1739 /* The ELF section number of this section. */
1742 /* Used by the backend linker when generating a shared library to
1743 record the dynamic symbol index for a section symbol
1744 corresponding to this section. A value of 0 means that there is
1745 no dynamic symbol for this section. */
1748 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1749 asection
*linked_to
;
1751 /* A pointer to the swapped relocs. If the section uses REL relocs,
1752 rather than RELA, all the r_addend fields will be zero. This
1753 pointer may be NULL. It is used by the backend linker. */
1754 Elf_Internal_Rela
*relocs
;
1756 /* A pointer to a linked list tracking dynamic relocs copied for
1760 /* A pointer to the bfd section used for dynamic relocs. */
1764 /* Group name, if this section is a member of a group. */
1767 /* Group signature sym, if this is the SHT_GROUP section. */
1768 struct bfd_symbol
*id
;
1771 /* For a member of a group, points to the SHT_GROUP section.
1772 NULL for the SHT_GROUP section itself and non-group sections. */
1773 asection
*sec_group
;
1775 /* A linked list of member sections in the group. Circular when used by
1776 the linker. For the SHT_GROUP section, points at first member. */
1777 asection
*next_in_group
;
1779 /* The FDEs associated with this section. The u.fde.next_in_section
1780 field acts as a chain pointer. */
1781 struct eh_cie_fde
*fde_list
;
1783 /* Link from a text section to its .eh_frame_entry section. */
1784 asection
*eh_frame_entry
;
1786 /* TRUE if the section has secondary reloc sections associated with it.
1787 FIXME: In the future it might be better to change this into a list
1788 of secondary reloc sections, making lookup easier and faster. */
1789 bool has_secondary_relocs
;
1791 /* A pointer used for various section optimizations. */
1795 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1796 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1797 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1798 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1799 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1800 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1801 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1802 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1803 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1804 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1805 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1807 #define xvec_get_elf_backend_data(xvec) \
1808 ((const struct elf_backend_data *) (xvec)->backend_data)
1810 #define get_elf_backend_data(abfd) \
1811 xvec_get_elf_backend_data ((abfd)->xvec)
1813 /* The least object attributes (within an attributes subsection) known
1814 for any target. Some code assumes that the value 0 is not used and
1815 the field for that attribute can instead be used as a marker to
1816 indicate that attributes have been initialized. */
1817 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1819 /* The maximum number of known object attributes for any target. */
1820 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1822 /* The value of an object attribute. The type indicates whether the attribute
1823 holds and integer, a string, or both. It can also indicate that there can
1824 be no default (i.e. all values must be written to file, even zero), or
1825 that the value is in error and should not be written to file. */
1827 typedef struct obj_attribute
1829 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1830 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1831 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1832 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1834 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1835 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1836 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1837 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1844 typedef struct obj_attribute_list
1846 struct obj_attribute_list
*next
;
1849 } obj_attribute_list
;
1851 /* Object attributes may either be defined by the processor ABI, index
1852 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1853 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1854 #define OBJ_ATTR_PROC 0
1855 #define OBJ_ATTR_GNU 1
1856 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1857 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1859 /* The following object attribute tags are taken as generic, for all
1860 targets and for "gnu" where there is no target standard. */
1867 Tag_compatibility
= 32
1870 /* The following struct stores information about every SystemTap section
1871 found in the object file. */
1874 struct sdt_note
*next
;
1879 /* tdata information grabbed from an elf core file. */
1880 struct core_elf_obj_tdata
1889 /* Extra tdata information held for output ELF BFDs. */
1890 struct output_elf_obj_tdata
1892 struct elf_segment_map
*seg_map
;
1893 struct elf_strtab_hash
*strtab_ptr
;
1895 /* STT_SECTION symbols for each section */
1896 asymbol
**section_syms
;
1898 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1900 asection
*eh_frame_hdr
;
1902 /* NT_GNU_BUILD_ID note type info. */
1905 bool (*after_write_object_contents
) (bfd
*);
1910 /* Records the result of `get_program_header_size'. */
1911 bfd_size_type program_header_size
;
1913 /* Used when laying out sections. */
1914 file_ptr next_file_pos
;
1916 /* Linker information. */
1917 struct bfd_link_info
*link_info
;
1919 int num_section_syms
;
1920 unsigned int shstrtab_section
, strtab_section
;
1922 /* Segment flags for the PT_GNU_STACK segment. */
1923 unsigned int stack_flags
;
1925 /* Used to determine if the e_flags field has been initialized */
1929 /* Indicate if the bfd contains SHF_GNU_MBIND/SHF_GNU_RETAIN sections or
1930 symbols that have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE
1931 binding. Used to set the osabi field in the ELF header structure. */
1934 elf_gnu_osabi_mbind
= 1 << 0,
1935 elf_gnu_osabi_ifunc
= 1 << 1,
1936 elf_gnu_osabi_unique
= 1 << 2,
1937 elf_gnu_osabi_retain
= 1 << 3,
1940 typedef struct elf_section_list
1942 Elf_Internal_Shdr hdr
;
1944 struct elf_section_list
* next
;
1947 enum dynamic_lib_link_class
{
1951 DYN_NO_ADD_NEEDED
= 4,
1955 /* Some private data is stashed away for future use using the tdata pointer
1956 in the bfd structure. */
1958 struct elf_obj_tdata
1960 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1961 Elf_Internal_Shdr
**elf_sect_ptr
;
1962 Elf_Internal_Phdr
*phdr
;
1963 Elf_Internal_Shdr symtab_hdr
;
1964 Elf_Internal_Shdr shstrtab_hdr
;
1965 Elf_Internal_Shdr strtab_hdr
;
1966 Elf_Internal_Shdr dynsymtab_hdr
;
1967 Elf_Internal_Shdr dynstrtab_hdr
;
1968 Elf_Internal_Shdr dynversym_hdr
;
1969 Elf_Internal_Shdr dynverref_hdr
;
1970 Elf_Internal_Shdr dynverdef_hdr
;
1971 elf_section_list
* symtab_shndx_list
;
1972 bfd_vma gp
; /* The gp value */
1973 unsigned int gp_size
; /* The gp size */
1974 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1975 unsigned char *being_created
;
1977 /* A mapping from external symbols to entries in the linker hash
1978 table, used when linking. This is indexed by the symbol index
1979 minus the sh_info field of the symbol table header. */
1980 struct elf_link_hash_entry
**sym_hashes
;
1982 /* Track usage and final offsets of GOT entries for local symbols.
1983 This array is indexed by symbol index. Elements are used
1984 identically to "got" in struct elf_link_hash_entry. */
1987 bfd_signed_vma
*refcounts
;
1989 struct got_entry
**ents
;
1992 /* The linker ELF emulation code needs to let the backend ELF linker
1993 know what filename should be used for a dynamic object if the
1994 dynamic object is found using a search. The emulation code then
1995 sometimes needs to know what name was actually used. Until the
1996 file has been added to the linker symbol table, this field holds
1997 the name the linker wants. After it has been added, it holds the
1998 name actually used, which will be the DT_SONAME entry if there is
2000 const char *dt_name
;
2002 /* The linker emulation needs to know what audit libs
2003 are used by a dynamic object. */
2004 const char *dt_audit
;
2006 /* Used by find_nearest_line entry point. */
2009 /* A place to stash dwarf1 info for this bfd. */
2010 struct dwarf1_debug
*dwarf1_find_line_info
;
2012 /* A place to stash dwarf2 info for this bfd. */
2013 void *dwarf2_find_line_info
;
2015 /* Stash away info for yet another find line/function variant. */
2016 void *elf_find_function_cache
;
2018 /* Number of symbol version definitions we are about to emit. */
2019 unsigned int cverdefs
;
2021 /* Number of symbol version references we are about to emit. */
2022 unsigned int cverrefs
;
2024 /* Symbol version definitions in external objects. */
2025 Elf_Internal_Verdef
*verdef
;
2027 /* Symbol version references to external objects. */
2028 Elf_Internal_Verneed
*verref
;
2030 /* A pointer to the .eh_frame section. */
2031 asection
*eh_frame_section
;
2033 /* Symbol buffer. */
2036 /* List of GNU properties. Will be updated by setup_gnu_properties
2037 after all input GNU properties are merged for output. */
2038 elf_property_list
*properties
;
2040 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
2041 obj_attribute_list
*other_obj_attributes
[2];
2043 /* Linked-list containing information about every Systemtap section
2044 found in the object file. Each section corresponds to one entry
2046 struct sdt_note
*sdt_note_head
;
2048 Elf_Internal_Shdr
**group_sect_ptr
;
2049 unsigned int num_group
;
2051 /* Index into group_sect_ptr, updated by setup_group when finding a
2052 section's group. Used to optimize subsequent group searches. */
2053 unsigned int group_search_offset
;
2055 unsigned int symtab_section
, dynsymtab_section
;
2056 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
2058 /* An identifier used to distinguish different target
2059 specific extensions to this structure. */
2060 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
2062 /* Whether a dyanmic object was specified normally on the linker
2063 command line, or was specified when --as-needed was in effect,
2064 or was found via a DT_NEEDED entry. */
2065 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
2067 /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
2068 ENUM_BITFIELD (elf_gnu_osabi
) has_gnu_osabi
: 4;
2070 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
2072 unsigned int has_no_copy_on_protected
: 1;
2074 /* Irix 5 often screws up the symbol table, sorting local symbols
2075 after global symbols. This flag is set if the symbol table in
2076 this BFD appears to be screwed up. If it is, we ignore the
2077 sh_info field in the symbol table header, and always read all the
2079 unsigned int bad_symtab
: 1;
2081 /* Information grabbed from an elf core file. */
2082 struct core_elf_obj_tdata
*core
;
2084 /* More information held for output ELF BFDs. */
2085 struct output_elf_obj_tdata
*o
;
2088 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
2090 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
2091 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
2092 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
2093 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
2094 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
2095 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
2096 #define elf_link_info(bfd) (elf_tdata(bfd) -> o->link_info)
2097 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
2098 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
2099 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
2100 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
2101 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
2102 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
2103 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
2104 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
2105 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
2106 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
2107 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
2108 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
2109 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
2110 #define elf_eh_frame_section(bfd) \
2111 (elf_tdata(bfd) -> eh_frame_section)
2112 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
2113 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
2114 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
2115 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
2116 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
2117 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
2118 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
2119 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
2120 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
2121 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
2122 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
2123 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
2124 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
2125 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
2126 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
2127 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
2128 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2129 #define elf_known_obj_attributes_proc(bfd) \
2130 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2131 #define elf_other_obj_attributes_proc(bfd) \
2132 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2133 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2134 #define elf_has_no_copy_on_protected(bfd) \
2135 (elf_tdata(bfd) -> has_no_copy_on_protected)
2137 extern void _bfd_elf_swap_verdef_in
2138 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
2139 extern void _bfd_elf_swap_verdef_out
2140 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
2141 extern void _bfd_elf_swap_verdaux_in
2142 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
2143 extern void _bfd_elf_swap_verdaux_out
2144 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
2145 extern void _bfd_elf_swap_verneed_in
2146 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
2147 extern void _bfd_elf_swap_verneed_out
2148 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
2149 extern void _bfd_elf_swap_vernaux_in
2150 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
2151 extern void _bfd_elf_swap_vernaux_out
2152 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
2153 extern void _bfd_elf_swap_versym_in
2154 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
2155 extern void _bfd_elf_swap_versym_out
2156 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
2158 extern unsigned int _bfd_elf_section_from_bfd_section
2159 (bfd
*, asection
*);
2160 extern char *bfd_elf_string_from_elf_section
2161 (bfd
*, unsigned, unsigned);
2162 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
2163 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
2164 Elf_External_Sym_Shndx
*);
2165 extern char * bfd_elf_get_str_section (bfd
*, unsigned int);
2166 extern const char *bfd_elf_sym_name
2167 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
2169 extern bool _bfd_elf_copy_private_bfd_data
2171 extern bool _bfd_elf_print_private_bfd_data
2173 const char * _bfd_elf_get_symbol_version_string
2174 (bfd
*, asymbol
*, bool, bool *);
2175 extern void bfd_elf_print_symbol
2176 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
2178 extern unsigned int _bfd_elf_eh_frame_address_size
2179 (bfd
*, const asection
*);
2180 extern bfd_byte _bfd_elf_encode_eh_address
2181 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
2182 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
2183 extern bool _bfd_elf_can_make_relative
2184 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
2186 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
2187 (const struct bfd_link_info
*, const asection
*,
2188 const Elf_Internal_Rela
*);
2189 extern bfd_vma _bfd_elf_rela_local_sym
2190 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
2191 extern bfd_vma _bfd_elf_rel_local_sym
2192 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
2193 extern bfd_vma _bfd_elf_section_offset
2194 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2196 extern unsigned long bfd_elf_hash
2198 extern unsigned long bfd_elf_gnu_hash
2201 extern bfd_reloc_status_type bfd_elf_generic_reloc
2202 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
2203 extern bool bfd_elf_allocate_object
2204 (bfd
*, size_t, enum elf_target_id
);
2205 extern bool bfd_elf_make_object
2207 extern bool bfd_elf_mkcorefile
2209 extern bool _bfd_elf_make_section_from_shdr
2210 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
2211 extern bool _bfd_elf_make_section_from_phdr
2212 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
2213 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
2214 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
2215 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
2217 extern void _bfd_elf_link_hash_table_free
2219 extern void _bfd_elf_link_hash_copy_indirect
2220 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2221 struct elf_link_hash_entry
*);
2222 extern void _bfd_elf_link_hash_hide_symbol
2223 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
2224 extern void _bfd_elf_link_hide_symbol
2225 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
2226 extern bool _bfd_elf_link_hash_fixup_symbol
2227 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2228 extern bool _bfd_elf_link_hash_table_init
2229 (struct elf_link_hash_table
*, bfd
*,
2230 struct bfd_hash_entry
*(*)
2231 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
2232 unsigned int, enum elf_target_id
);
2233 extern bool _bfd_elf_slurp_version_tables
2235 extern bool _bfd_elf_merge_sections
2236 (bfd
*, struct bfd_link_info
*);
2237 extern bool _bfd_elf_match_sections_by_type
2238 (bfd
*, const asection
*, bfd
*, const asection
*);
2239 extern bool bfd_elf_is_group_section
2240 (bfd
*, const struct bfd_section
*);
2241 extern const char *bfd_elf_group_name
2242 (bfd
*, const struct bfd_section
*);
2243 extern bool _bfd_elf_section_already_linked
2244 (bfd
*, asection
*, struct bfd_link_info
*);
2245 extern void bfd_elf_set_group_contents
2246 (bfd
*, asection
*, void *);
2247 extern unsigned int _bfd_elf_filter_global_symbols
2248 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
2249 extern asection
*_bfd_elf_check_kept_section
2250 (asection
*, struct bfd_link_info
*);
2251 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2252 extern void _bfd_elf_copy_link_hash_symbol_type
2253 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
2254 extern bool _bfd_elf_size_group_sections
2255 (struct bfd_link_info
*);
2256 extern bool _bfd_elf_fixup_group_sections
2257 (bfd
*, asection
*);
2258 extern bool _bfd_elf_copy_private_header_data
2260 extern bool _bfd_elf_copy_private_symbol_data
2261 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2262 #define _bfd_generic_init_private_section_data \
2263 _bfd_elf_init_private_section_data
2264 extern bool _bfd_elf_init_private_section_data
2265 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2266 extern bool _bfd_elf_copy_private_section_data
2267 (bfd
*, asection
*, bfd
*, asection
*);
2268 extern bool _bfd_elf_write_object_contents
2270 extern bool _bfd_elf_write_corefile_contents
2272 extern bool _bfd_elf_set_section_contents
2273 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2274 extern long _bfd_elf_get_symtab_upper_bound
2276 extern long _bfd_elf_canonicalize_symtab
2277 (bfd
*, asymbol
**);
2278 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2280 extern long _bfd_elf_canonicalize_dynamic_symtab
2281 (bfd
*, asymbol
**);
2282 extern long _bfd_elf_get_synthetic_symtab
2283 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2284 extern long _bfd_elf_get_reloc_upper_bound
2286 extern long _bfd_elf_canonicalize_reloc
2287 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2288 extern asection
* _bfd_elf_get_dynamic_reloc_section
2289 (bfd
*, asection
*, bool);
2290 extern asection
* _bfd_elf_make_dynamic_reloc_section
2291 (asection
*, bfd
*, unsigned int, bfd
*, bool);
2292 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2294 extern long _bfd_elf_canonicalize_dynamic_reloc
2295 (bfd
*, arelent
**, asymbol
**);
2296 extern asymbol
*_bfd_elf_make_empty_symbol
2298 extern void _bfd_elf_get_symbol_info
2299 (bfd
*, asymbol
*, symbol_info
*);
2300 extern bool _bfd_elf_is_local_label_name
2301 (bfd
*, const char *);
2302 extern alent
*_bfd_elf_get_lineno
2304 extern bool _bfd_elf_set_arch_mach
2305 (bfd
*, enum bfd_architecture
, unsigned long);
2306 extern bool _bfd_elf_find_nearest_line
2307 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2308 const char **, const char **, unsigned int *, unsigned int *);
2309 extern bool _bfd_elf_find_line
2310 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2311 extern bool _bfd_elf_find_inliner_info
2312 (bfd
*, const char **, const char **, unsigned int *);
2313 extern asymbol
*_bfd_elf_find_function
2314 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2315 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2316 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2317 extern int _bfd_elf_sizeof_headers
2318 (bfd
*, struct bfd_link_info
*);
2319 extern bool _bfd_elf_new_section_hook
2320 (bfd
*, asection
*);
2321 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2322 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2323 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2324 (bfd
*, asection
*);
2326 extern bool _bfd_elf_link_hide_sym_by_version
2327 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2329 /* If the target doesn't have reloc handling written yet: */
2330 extern bool _bfd_elf_no_info_to_howto
2331 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2333 extern bool bfd_section_from_shdr
2334 (bfd
*, unsigned int shindex
);
2335 extern bool bfd_section_from_phdr
2336 (bfd
*, Elf_Internal_Phdr
*, int);
2338 extern int _bfd_elf_symbol_from_bfd_symbol
2339 (bfd
*, asymbol
**);
2341 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2342 (struct sym_cache
*, bfd
*, unsigned long);
2343 extern asection
*bfd_section_from_elf_index
2344 (bfd
*, unsigned int);
2346 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2348 extern void _bfd_elf_strtab_free
2349 (struct elf_strtab_hash
*);
2350 extern size_t _bfd_elf_strtab_add
2351 (struct elf_strtab_hash
*, const char *, bool);
2352 extern void _bfd_elf_strtab_addref
2353 (struct elf_strtab_hash
*, size_t);
2354 extern void _bfd_elf_strtab_delref
2355 (struct elf_strtab_hash
*, size_t);
2356 extern unsigned int _bfd_elf_strtab_refcount
2357 (struct elf_strtab_hash
*, size_t);
2358 extern void _bfd_elf_strtab_clear_all_refs
2359 (struct elf_strtab_hash
*);
2360 extern void *_bfd_elf_strtab_save
2361 (struct elf_strtab_hash
*);
2362 extern void _bfd_elf_strtab_restore
2363 (struct elf_strtab_hash
*, void *);
2364 extern bfd_size_type _bfd_elf_strtab_size
2365 (struct elf_strtab_hash
*);
2366 extern bfd_size_type _bfd_elf_strtab_len
2367 (struct elf_strtab_hash
*);
2368 extern bfd_size_type _bfd_elf_strtab_offset
2369 (struct elf_strtab_hash
*, size_t);
2370 extern const char * _bfd_elf_strtab_str
2371 (struct elf_strtab_hash
*, size_t idx
, bfd_size_type
*offset
);
2372 extern bool _bfd_elf_strtab_emit
2373 (bfd
*, struct elf_strtab_hash
*);
2374 extern void _bfd_elf_strtab_finalize
2375 (struct elf_strtab_hash
*);
2377 extern bool bfd_elf_parse_eh_frame_entries
2378 (bfd
*, struct bfd_link_info
*);
2379 extern bool _bfd_elf_parse_eh_frame_entry
2380 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2381 extern void _bfd_elf_parse_eh_frame
2382 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2383 extern bool _bfd_elf_end_eh_frame_parsing
2384 (struct bfd_link_info
*info
);
2386 extern bool _bfd_elf_discard_section_eh_frame
2387 (bfd
*, struct bfd_link_info
*, asection
*,
2388 bool (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2389 extern bool _bfd_elf_adjust_eh_frame_global_symbol
2390 (struct elf_link_hash_entry
*, void *);
2391 extern bool _bfd_elf_discard_section_eh_frame_hdr
2392 (bfd
*, struct bfd_link_info
*);
2393 extern bfd_vma _bfd_elf_eh_frame_section_offset
2394 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2395 extern bool _bfd_elf_write_section_eh_frame
2396 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2397 bool _bfd_elf_write_section_eh_frame_entry
2398 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2399 extern bool _bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2400 extern bool _bfd_elf_write_section_eh_frame_hdr
2401 (bfd
*, struct bfd_link_info
*);
2402 extern bool _bfd_elf_eh_frame_present
2403 (struct bfd_link_info
*);
2404 extern bool _bfd_elf_eh_frame_entry_present
2405 (struct bfd_link_info
*);
2406 extern bool _bfd_elf_maybe_strip_eh_frame_hdr
2407 (struct bfd_link_info
*);
2409 extern bool _bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2411 extern long _bfd_elf_link_lookup_local_dynindx
2412 (struct bfd_link_info
*, bfd
*, long);
2413 extern bool _bfd_elf_compute_section_file_positions
2414 (bfd
*, struct bfd_link_info
*);
2415 extern file_ptr _bfd_elf_assign_file_position_for_section
2416 (Elf_Internal_Shdr
*, file_ptr
, bool);
2417 extern bool _bfd_elf_modify_headers
2418 (bfd
*, struct bfd_link_info
*);
2420 extern bool _bfd_elf_validate_reloc
2423 extern bool bfd_elf_record_link_assignment
2424 (bfd
*, struct bfd_link_info
*, const char *, bool,
2426 extern bool bfd_elf_stack_segment_size (bfd
*, struct bfd_link_info
*,
2427 const char *, bfd_vma
);
2428 extern bool bfd_elf_size_dynamic_sections
2429 (bfd
*, const char *, const char *, const char *, const char *, const char *,
2430 const char * const *, struct bfd_link_info
*, struct bfd_section
**);
2431 extern bool bfd_elf_size_dynsym_hash_dynstr
2432 (bfd
*, struct bfd_link_info
*);
2433 extern bool bfd_elf_get_bfd_needed_list
2434 (bfd
*, struct bfd_link_needed_list
**);
2435 extern struct bfd_link_needed_list
*bfd_elf_get_needed_list
2436 (bfd
*, struct bfd_link_info
*);
2437 extern void bfd_elf_set_dt_needed_name
2438 (bfd
*, const char *);
2439 extern const char *bfd_elf_get_dt_soname
2441 extern void bfd_elf_set_dyn_lib_class
2442 (bfd
*, enum dynamic_lib_link_class
);
2443 extern int bfd_elf_get_dyn_lib_class
2445 extern struct bfd_link_needed_list
*bfd_elf_get_runpath_list
2446 (bfd
*, struct bfd_link_info
*);
2447 extern int bfd_elf_discard_info
2448 (bfd
*, struct bfd_link_info
*);
2449 extern unsigned int _bfd_elf_default_action_discarded
2450 (struct bfd_section
*);
2451 extern struct bfd_section
*_bfd_elf_tls_setup
2452 (bfd
*, struct bfd_link_info
*);
2454 extern bool _bfd_elf_link_create_dynamic_sections
2455 (bfd
*, struct bfd_link_info
*);
2456 extern bool _bfd_elf_omit_section_dynsym_default
2457 (bfd
*, struct bfd_link_info
*, asection
*);
2458 extern bool _bfd_elf_omit_section_dynsym_all
2459 (bfd
*, struct bfd_link_info
*, asection
*);
2460 extern bool _bfd_elf_create_dynamic_sections
2461 (bfd
*, struct bfd_link_info
*);
2462 extern bool _bfd_elf_create_got_section
2463 (bfd
*, struct bfd_link_info
*);
2464 extern asection
*_bfd_elf_section_for_symbol
2465 (struct elf_reloc_cookie
*, unsigned long, bool);
2466 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2467 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2468 extern void _bfd_elf_init_1_index_section
2469 (bfd
*, struct bfd_link_info
*);
2470 extern void _bfd_elf_init_2_index_sections
2471 (bfd
*, struct bfd_link_info
*);
2473 extern bool _bfd_elfcore_make_pseudosection
2474 (bfd
*, char *, size_t, ufile_ptr
);
2475 extern char *_bfd_elfcore_strndup
2476 (bfd
*, char *, size_t);
2478 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2479 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bool);
2481 extern bool _bfd_elf_link_output_relocs
2482 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2483 struct elf_link_hash_entry
**);
2485 extern bool _bfd_elf_adjust_dynamic_copy
2486 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2488 extern bool _bfd_elf_dynamic_symbol_p
2489 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2491 extern bool _bfd_elf_symbol_refs_local_p
2492 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2494 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2495 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2497 extern bool _bfd_elf_setup_sections
2500 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2501 (struct bfd_link_info
*, const char *, asection
*);
2503 extern bool _bfd_elf_init_file_header (bfd
*, struct bfd_link_info
*);
2505 extern bool _bfd_elf_final_write_processing (bfd
*);
2507 extern bfd_cleanup bfd_elf32_object_p
2509 extern bfd_cleanup bfd_elf32_core_file_p
2511 extern char *bfd_elf32_core_file_failing_command
2513 extern int bfd_elf32_core_file_failing_signal
2515 extern bool bfd_elf32_core_file_matches_executable_p
2517 extern int bfd_elf32_core_file_pid
2519 extern bool _bfd_elf32_core_find_build_id
2522 extern bool bfd_elf32_swap_symbol_in
2523 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2524 extern void bfd_elf32_swap_symbol_out
2525 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2526 extern void bfd_elf32_swap_reloc_in
2527 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2528 extern void bfd_elf32_swap_reloc_out
2529 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2530 extern void bfd_elf32_swap_reloca_in
2531 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2532 extern void bfd_elf32_swap_reloca_out
2533 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2534 extern void bfd_elf32_swap_phdr_in
2535 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2536 extern void bfd_elf32_swap_phdr_out
2537 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2538 extern void bfd_elf32_swap_dyn_in
2539 (bfd
*, const void *, Elf_Internal_Dyn
*);
2540 extern void bfd_elf32_swap_dyn_out
2541 (bfd
*, const Elf_Internal_Dyn
*, void *);
2542 extern long bfd_elf32_slurp_symbol_table
2543 (bfd
*, asymbol
**, bool);
2544 extern bool bfd_elf32_write_shdrs_and_ehdr
2546 extern int bfd_elf32_write_out_phdrs
2547 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2548 extern bool bfd_elf32_checksum_contents
2549 (bfd
* , void (*) (const void *, size_t, void *), void *);
2550 extern void bfd_elf32_write_relocs
2551 (bfd
*, asection
*, void *);
2552 extern bool bfd_elf32_slurp_reloc_table
2553 (bfd
*, asection
*, asymbol
**, bool);
2555 extern bfd_cleanup bfd_elf64_object_p
2557 extern bfd_cleanup bfd_elf64_core_file_p
2559 extern char *bfd_elf64_core_file_failing_command
2561 extern int bfd_elf64_core_file_failing_signal
2563 extern bool bfd_elf64_core_file_matches_executable_p
2565 extern int bfd_elf64_core_file_pid
2567 extern bool _bfd_elf64_core_find_build_id
2570 extern bool bfd_elf64_swap_symbol_in
2571 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2572 extern void bfd_elf64_swap_symbol_out
2573 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2574 extern void bfd_elf64_swap_reloc_in
2575 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2576 extern void bfd_elf64_swap_reloc_out
2577 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2578 extern void bfd_elf64_swap_reloca_in
2579 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2580 extern void bfd_elf64_swap_reloca_out
2581 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2582 extern void bfd_elf64_swap_phdr_in
2583 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2584 extern void bfd_elf64_swap_phdr_out
2585 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2586 extern void bfd_elf64_swap_dyn_in
2587 (bfd
*, const void *, Elf_Internal_Dyn
*);
2588 extern void bfd_elf64_swap_dyn_out
2589 (bfd
*, const Elf_Internal_Dyn
*, void *);
2590 extern long bfd_elf64_slurp_symbol_table
2591 (bfd
*, asymbol
**, bool);
2592 extern bool bfd_elf64_write_shdrs_and_ehdr
2594 extern int bfd_elf64_write_out_phdrs
2595 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2596 extern bool bfd_elf64_checksum_contents
2597 (bfd
* , void (*) (const void *, size_t, void *), void *);
2598 extern void bfd_elf64_write_relocs
2599 (bfd
*, asection
*, void *);
2600 extern bool bfd_elf64_slurp_reloc_table
2601 (bfd
*, asection
*, asymbol
**, bool);
2603 extern bool _bfd_elf_default_relocs_compatible
2604 (const bfd_target
*, const bfd_target
*);
2606 extern bool _bfd_elf_relocs_compatible
2607 (const bfd_target
*, const bfd_target
*);
2608 extern bool _bfd_elf_notice_as_needed
2609 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2611 extern struct bfd_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2612 (bfd
*, struct bfd_link_info
*, const char *);
2613 extern bool bfd_elf_link_add_symbols
2614 (bfd
*, struct bfd_link_info
*);
2615 extern bool _bfd_elf_add_dynamic_entry
2616 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2617 extern bool _bfd_elf_strip_zero_sized_dynamic_sections
2618 (struct bfd_link_info
*);
2619 extern int bfd_elf_add_dt_needed_tag
2620 (bfd
*, struct bfd_link_info
*);
2621 extern bool _bfd_elf_link_check_relocs
2622 (bfd
*, struct bfd_link_info
*);
2624 extern bool bfd_elf_link_record_dynamic_symbol
2625 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2627 extern int bfd_elf_link_record_local_dynamic_symbol
2628 (struct bfd_link_info
*, bfd
*, long);
2630 extern bool _bfd_elf_close_and_cleanup
2633 extern bool _bfd_elf_common_definition
2634 (Elf_Internal_Sym
*);
2636 extern unsigned int _bfd_elf_common_section_index
2639 extern asection
*_bfd_elf_common_section
2642 extern bfd_vma _bfd_elf_default_got_elt_size
2643 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2646 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2647 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2648 asection
*, bfd
*, char **);
2650 extern bool bfd_elf_final_link
2651 (bfd
*, struct bfd_link_info
*);
2653 extern void _bfd_elf_gc_keep
2654 (struct bfd_link_info
*info
);
2656 extern bool bfd_elf_gc_mark_dynamic_ref_symbol
2657 (struct elf_link_hash_entry
*h
, void *inf
);
2659 extern bool bfd_elf_gc_sections
2660 (bfd
*, struct bfd_link_info
*);
2662 extern bool bfd_elf_gc_record_vtinherit
2663 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2665 extern bool bfd_elf_gc_record_vtentry
2666 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2668 extern asection
*_bfd_elf_gc_mark_hook
2669 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2670 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2672 extern asection
*_bfd_elf_gc_mark_rsec
2673 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2674 struct elf_reloc_cookie
*, bool *);
2676 extern bool _bfd_elf_gc_mark_reloc
2677 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2678 struct elf_reloc_cookie
*);
2680 extern bool _bfd_elf_gc_mark_fdes
2681 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2682 struct elf_reloc_cookie
*);
2684 extern bool _bfd_elf_gc_mark
2685 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2687 extern bool _bfd_elf_gc_mark_extra_sections
2688 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2690 extern bool bfd_elf_gc_common_finalize_got_offsets
2691 (bfd
*, struct bfd_link_info
*);
2693 extern bool bfd_elf_gc_common_final_link
2694 (bfd
*, struct bfd_link_info
*);
2696 extern bool bfd_elf_reloc_symbol_deleted_p
2699 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2700 (bfd
*, asection
*);
2702 extern bool _bfd_elf_map_sections_to_segments
2703 (bfd
*, struct bfd_link_info
*);
2705 extern bool _bfd_elf_is_function_type (unsigned int);
2707 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2710 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2712 extern int bfd_elf_get_default_section_type (flagword
);
2714 extern bool bfd_elf_lookup_section_flags
2715 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2717 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2718 (bfd
* abfd
, asection
* section
);
2720 /* PowerPC @tls opcode transform/validate. */
2721 extern unsigned int _bfd_elf_ppc_at_tls_transform
2722 (unsigned int, unsigned int);
2723 /* PowerPC @tprel opcode transform/validate. */
2724 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2725 (unsigned int, unsigned int);
2726 /* PowerPC elf_object_p tweak. */
2727 extern bool _bfd_elf_ppc_set_arch (bfd
*);
2728 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2729 extern bool _bfd_elf_ppc_merge_fp_attributes
2730 (bfd
*, struct bfd_link_info
*);
2732 /* Return an upper bound on the number of bytes required to store a
2733 copy of ABFD's program header table entries. Return -1 if an error
2734 occurs; bfd_get_error will return an appropriate code. */
2735 extern long bfd_get_elf_phdr_upper_bound
2738 /* Copy ABFD's program header table entries to *PHDRS. The entries
2739 will be stored as an array of Elf_Internal_Phdr structures, as
2740 defined in include/elf/internal.h. To find out how large the
2741 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
2743 Return the number of program header table entries read, or -1 if an
2744 error occurs; bfd_get_error will return an appropriate code. */
2745 extern int bfd_get_elf_phdrs
2746 (bfd
*abfd
, void *phdrs
);
2748 /* Exported interface for writing elf corefile notes. */
2749 extern char *elfcore_write_note
2750 (bfd
*, char *, int *, const char *, int, const void *, int);
2751 extern char *elfcore_write_prpsinfo
2752 (bfd
*, char *, int *, const char *, const char *);
2753 extern char *elfcore_write_prstatus
2754 (bfd
*, char *, int *, long, int, const void *);
2755 extern char * elfcore_write_pstatus
2756 (bfd
*, char *, int *, long, int, const void *);
2757 extern char *elfcore_write_prfpreg
2758 (bfd
*, char *, int *, const void *, int);
2759 extern char *elfcore_write_prxfpreg
2760 (bfd
*, char *, int *, const void *, int);
2761 extern char *elfcore_write_xstatereg
2762 (bfd
*, char *, int *, const void *, int);
2763 extern char *elfcore_write_ppc_vmx
2764 (bfd
*, char *, int *, const void *, int);
2765 extern char *elfcore_write_ppc_vsx
2766 (bfd
*, char *, int *, const void *, int);
2767 extern char *elfcore_write_ppc_tar
2768 (bfd
*, char *, int *, const void *, int);
2769 extern char *elfcore_write_ppc_ppr
2770 (bfd
*, char *, int *, const void *, int);
2771 extern char *elfcore_write_ppc_dscr
2772 (bfd
*, char *, int *, const void *, int);
2773 extern char *elfcore_write_ppc_ebb
2774 (bfd
*, char *, int *, const void *, int);
2775 extern char *elfcore_write_ppc_pmu
2776 (bfd
*, char *, int *, const void *, int);
2777 extern char *elfcore_write_ppc_tm_cgpr
2778 (bfd
*, char *, int *, const void *, int);
2779 extern char *elfcore_write_ppc_tm_cfpr
2780 (bfd
*, char *, int *, const void *, int);
2781 extern char *elfcore_write_ppc_tm_cvmx
2782 (bfd
*, char *, int *, const void *, int);
2783 extern char *elfcore_write_ppc_tm_cvsx
2784 (bfd
*, char *, int *, const void *, int);
2785 extern char *elfcore_write_ppc_tm_spr
2786 (bfd
*, char *, int *, const void *, int);
2787 extern char *elfcore_write_ppc_tm_ctar
2788 (bfd
*, char *, int *, const void *, int);
2789 extern char *elfcore_write_ppc_tm_cppr
2790 (bfd
*, char *, int *, const void *, int);
2791 extern char *elfcore_write_ppc_tm_cdscr
2792 (bfd
*, char *, int *, const void *, int);
2793 extern char *elfcore_write_s390_timer
2794 (bfd
*, char *, int *, const void *, int);
2795 extern char *elfcore_write_s390_todcmp
2796 (bfd
*, char *, int *, const void *, int);
2797 extern char *elfcore_write_s390_todpreg
2798 (bfd
*, char *, int *, const void *, int);
2799 extern char *elfcore_write_s390_ctrs
2800 (bfd
*, char *, int *, const void *, int);
2801 extern char *elfcore_write_s390_prefix
2802 (bfd
*, char *, int *, const void *, int);
2803 extern char *elfcore_write_s390_last_break
2804 (bfd
*, char *, int *, const void *, int);
2805 extern char *elfcore_write_s390_system_call
2806 (bfd
*, char *, int *, const void *, int);
2807 extern char *elfcore_write_s390_tdb
2808 (bfd
*, char *, int *, const void *, int);
2809 extern char *elfcore_write_s390_vxrs_low
2810 (bfd
*, char *, int *, const void *, int);
2811 extern char *elfcore_write_s390_vxrs_high
2812 (bfd
*, char *, int *, const void *, int);
2813 extern char *elfcore_write_s390_gs_cb
2814 (bfd
*, char *, int *, const void *, int);
2815 extern char *elfcore_write_s390_gs_bc
2816 (bfd
*, char *, int *, const void *, int);
2817 extern char *elfcore_write_arm_vfp
2818 (bfd
*, char *, int *, const void *, int);
2819 extern char *elfcore_write_aarch_tls
2820 (bfd
*, char *, int *, const void *, int);
2821 extern char *elfcore_write_aarch_hw_break
2822 (bfd
*, char *, int *, const void *, int);
2823 extern char *elfcore_write_aarch_hw_watch
2824 (bfd
*, char *, int *, const void *, int);
2825 extern char *elfcore_write_aarch_sve
2826 (bfd
*, char *, int *, const void *, int);
2827 extern char *elfcore_write_aarch_pauth
2828 (bfd
*, char *, int *, const void *, int);
2829 extern char *elfcore_write_arc_v2
2830 (bfd
*, char *, int *, const void *, int);
2831 extern char *elfcore_write_riscv_csr
2832 (bfd
*, char *, int *, const void *, int);
2833 extern char *elfcore_write_gdb_tdesc
2834 (bfd
*, char *, int *, const void *, int);
2835 extern char *elfcore_write_lwpstatus
2836 (bfd
*, char *, int *, long, int, const void *);
2837 extern char *elfcore_write_register_note
2838 (bfd
*, char *, int *, const char *, const void *, int);
2839 extern char *elfcore_write_file_note
2840 (bfd
*, char *, int *, const void*, int);
2842 /* Internal structure which holds information to be included in the
2843 PRPSINFO section of Linux core files.
2845 This is an "internal" structure in the sense that it should be used
2846 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2847 function), so things like endianess shouldn't be an issue. This
2848 structure will eventually be converted in one of the
2849 `elf_external_linux_*' structures and written out to an output bfd
2850 by one of the functions declared below. */
2852 struct elf_internal_linux_prpsinfo
2854 char pr_state
; /* Numeric process state. */
2855 char pr_sname
; /* Char for pr_state. */
2856 char pr_zomb
; /* Zombie. */
2857 char pr_nice
; /* Nice val. */
2858 unsigned long pr_flag
; /* Flags. */
2859 unsigned int pr_uid
;
2860 unsigned int pr_gid
;
2861 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2862 char pr_fname
[16 + 1]; /* Filename of executable. */
2863 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2866 /* Linux/most 32-bit archs. */
2867 extern char *elfcore_write_linux_prpsinfo32
2868 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2870 /* Linux/most 64-bit archs. */
2871 extern char *elfcore_write_linux_prpsinfo64
2872 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2874 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2875 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2876 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2877 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2878 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2879 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2881 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2882 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2883 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2884 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2885 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2886 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2887 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2888 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2889 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2890 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2891 unsigned int, const char *);
2892 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2893 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2896 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2897 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2898 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2899 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2900 extern bool _bfd_elf_merge_object_attributes
2901 (bfd
*, struct bfd_link_info
*);
2902 extern bool _bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2903 extern bool _bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2904 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2905 extern bool elf_read_notes (bfd
*, file_ptr
, bfd_size_type
, size_t);
2907 extern bool _bfd_elf_parse_gnu_properties
2908 (bfd
*, Elf_Internal_Note
*);
2909 extern elf_property
* _bfd_elf_get_property
2910 (bfd
*, unsigned int, unsigned int);
2911 extern bfd
*_bfd_elf_link_setup_gnu_properties
2912 (struct bfd_link_info
*);
2913 extern bfd_size_type _bfd_elf_convert_gnu_property_size
2915 extern bool _bfd_elf_convert_gnu_properties
2916 (bfd
*, asection
*, bfd
*, bfd_byte
**, bfd_size_type
*);
2918 /* The linker may need to keep track of the number of relocs that it
2919 decides to copy as dynamic relocs in check_relocs for each symbol.
2920 This is so that it can later discard them if they are found to be
2921 unnecessary. We can store the information in a field extending the
2922 regular ELF linker hash table. */
2924 struct elf_dyn_relocs
2926 struct elf_dyn_relocs
*next
;
2928 /* The input section of the reloc. */
2931 /* Total number of relocs copied for the input section. */
2932 bfd_size_type count
;
2934 /* Number of pc-relative relocs copied for the input section. */
2935 bfd_size_type pc_count
;
2938 extern bool _bfd_elf_create_ifunc_sections
2939 (bfd
*, struct bfd_link_info
*);
2940 extern bool _bfd_elf_allocate_ifunc_dyn_relocs
2941 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2942 struct elf_dyn_relocs
**, unsigned int, unsigned int,
2943 unsigned int, bool);
2945 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2946 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2948 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2949 extern bfd_vma
elf64_r_sym (bfd_vma
);
2950 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2951 extern bfd_vma
elf32_r_sym (bfd_vma
);
2953 extern bool is_debuginfo_file (bfd
*);
2956 extern bool _bfd_elf_init_secondary_reloc_section
2957 (bfd
*, Elf_Internal_Shdr
*, const char *, unsigned int);
2958 extern bool _bfd_elf_slurp_secondary_reloc_section
2959 (bfd
*, asection
*, asymbol
**, bool);
2960 extern bool _bfd_elf_copy_special_section_fields
2961 (const bfd
*, bfd
*, const Elf_Internal_Shdr
*, Elf_Internal_Shdr
*);
2962 extern bool _bfd_elf_write_secondary_reloc_section
2963 (bfd
*, asection
*);
2964 extern unsigned int _bfd_elf_symbol_section_index
2965 (bfd
*, elf_symbol_type
*);
2967 extern asection
*_bfd_elf_readonly_dynrelocs
2968 (struct elf_link_hash_entry
*);
2969 extern bool _bfd_elf_maybe_set_textrel
2970 (struct elf_link_hash_entry
*, void *);
2972 extern bool _bfd_elf_add_dynamic_tags
2973 (bfd
*, struct bfd_link_info
*, bool);
2975 /* Large common section. */
2976 extern asection _bfd_elf_large_com_section
;
2978 /* Hash for local symbol with the first section id, ID, in the input
2979 file and the local symbol index, SYM. */
2980 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2981 (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
2982 ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
2984 /* This is the condition under which finish_dynamic_symbol will be called.
2985 If our finish_dynamic_symbol isn't called, we'll need to do something
2986 about initializing any .plt and .got entries in relocate_section. */
2987 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2989 && ((SHARED) || !(H)->forced_local) \
2990 && ((H)->dynindx != -1 || (H)->forced_local))
2992 /* This macro is to avoid lots of duplicated code in the body
2993 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2994 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2995 r_symndx, symtab_hdr, sym_hashes, \
2996 h, sec, relocation, \
2997 unresolved_reloc, warned, ignored) \
3000 /* It seems this can happen with erroneous or unsupported \
3001 input (mixing a.out and elf in an archive, for example.) */ \
3002 if (sym_hashes == NULL) \
3005 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
3007 if (info->wrap_hash != NULL \
3008 && (input_section->flags & SEC_DEBUGGING) != 0) \
3009 h = ((struct elf_link_hash_entry *) \
3010 unwrap_hash_lookup (info, input_bfd, &h->root)); \
3012 while (h->root.type == bfd_link_hash_indirect \
3013 || h->root.type == bfd_link_hash_warning) \
3014 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
3018 unresolved_reloc = false; \
3020 if (h->root.type == bfd_link_hash_defined \
3021 || h->root.type == bfd_link_hash_defweak) \
3023 sec = h->root.u.def.section; \
3025 || sec->output_section == NULL) \
3026 /* Set a flag that will be cleared later if we find a \
3027 relocation value for this symbol. output_section \
3028 is typically NULL for symbols satisfied by a shared \
3030 unresolved_reloc = true; \
3032 relocation = (h->root.u.def.value \
3033 + sec->output_section->vma \
3034 + sec->output_offset); \
3036 else if (h->root.type == bfd_link_hash_undefweak) \
3038 else if (info->unresolved_syms_in_objects == RM_IGNORE \
3039 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
3041 else if (!bfd_link_relocatable (info)) \
3043 bool err = ((info->unresolved_syms_in_objects == RM_DIAGNOSE \
3044 && !info->warn_unresolved_syms) \
3045 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
3046 (*info->callbacks->undefined_symbol) (info, \
3047 h->root.root.string, \
3050 rel->r_offset, err); \
3053 (void) unresolved_reloc; \
3059 /* This macro is to avoid lots of duplicated code in the body of the
3060 loop over relocations in xxx_relocate_section() in the various
3063 Handle relocations against symbols from removed linkonce sections,
3064 or sections discarded by a linker script. When doing a relocatable
3065 link, we remove such relocations. Otherwise, we just want the
3066 section contents zeroed and avoid any special processing. */
3067 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
3068 rel, count, relend, \
3069 howto, index, contents) \
3072 _bfd_clear_contents (howto, input_bfd, input_section, \
3073 contents, rel[index].r_offset); \
3075 if (bfd_link_relocatable (info) \
3076 && (input_section->flags & SEC_DEBUGGING)) \
3078 /* Only remove relocations in debug sections since other \
3079 sections may require relocations. */ \
3080 Elf_Internal_Shdr *rel_hdr; \
3082 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
3084 /* Avoid empty output section. */ \
3085 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
3087 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3088 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
3089 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3091 memmove (rel, rel + count, \
3092 (relend - rel - count) * sizeof (*rel)); \
3094 input_section->reloc_count -= count; \
3101 for (i_ = 0; i_ < count; i_++) \
3103 rel[i_].r_info = 0; \
3104 rel[i_].r_addend = 0; \
3110 /* Will a symbol be bound to the definition within the shared
3111 library, if any. A unique symbol can never be bound locally. */
3112 #define SYMBOLIC_BIND(INFO, H) \
3113 (!(H)->unique_global \
3114 && ((INFO)->symbolic \
3115 || (H)->start_stop \
3116 || ((INFO)->dynamic && !(H)->dynamic)))
3118 /* Determine if a section contains CTF data, using its name. */
3120 bfd_section_is_ctf (const asection
*sec
)
3122 const char *name
= bfd_section_name (sec
);
3123 return startswith (name
, ".ctf") && (name
[4] == 0 || name
[4] == '.');
3129 #endif /* _LIBELF_H_ */